Emotiva X-Ref 12 User manual

Brand: Emotiva

Model: X-Ref 12

Category: Supplementary music equipment

Type: User manual

This manual is also suitable for

DSP Powered Subwoofer

User Manual

Important Safety Precautions and Explanation of Symbols

The exclamation point within an equilateral triangle is intended to alert the user to the

presence of important installation, operation, and service instructions in this manual.

The lightning ash with arrowhead symbol within an equilateral triangle is intended to

alert the user to the presence of uninsulated dangerous voltages within the enclosure

that may be of sufcient magnitude to constitute a risk of electrical shock to the user.

Please read this Installation and Operation Manual thoroughly before attempting to

install, congure, or operate the X-Ref subwoofer. After successful installation and

conguration of the X-Ref subwoofer, be sure to retain this manual in a safe place for

future reference.

Safety is a key component to a long lasting and trouble free installation. Please read

and follow all instructions and heed all warnings on the X-Ref subwoofer and in this

manual. The vast majority of the subsequent safety precautions are common sense. If

you are not comfortable with the installation of audio/video entertainment equipment,

you should seek the services of a qualied installation professional or call us for help.

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT

USE THE X-REF SUBWOOFER NEAR WATER OR IN WET LOCATIONS, DO NOT

EXPOSE IT TO RAIN OR MOISTURE, DO NOT EXPOSE IT TO DRIPPING OR

SPLASHING FROM OTHER SOURCES, AND ENSURE THAT NO OBJECTS FILLED

WITH LIQUIDS (SUCH AS VASES) ARE PLACED ON IT. DOING SO MAY RESULT

IN DAMAGE TO THE X-REF SUBWOOFER AND THE RISK OF ELECTRIC SHOCK TO

THE USER, WHICH MAY RESULT IN BODILY INJURY OR DEATH.

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE

COVER FROM THE X-REF SUBWOOFER. THERE ARE NO USER-SERVICEABLE

PARTS INSIDE THE X-REF SUBWOOFER. REFER ALL SERVICE TO QUALIFIED

SERVICE PERSONNEL.

Do not install the X-Ref subwoofer near or above any heat sources such as radiators,

heating vents, or other apparatus that produces heat. Do not block any ventilation

openings or heat sinks.

Always install your X-Ref subwoofer according to the manufacturer’s instructions and

only use with attachments or accessories specied by the manufacturer.

Do not install the X-Ref subwoofer on any stand, shelf, or other piece of furniture that

is unable to support its weight or withstand the vibrations produced by a subwoofer in

normal operation. If a cart is used to move the X-Ref subwoofer, use caution to avoid

injury from tip-over.

Connect the X-Ref subwoofer only to power sources of the correct voltage and

frequency (between 90 VAC and 250 VAC, 50 Hz or 60 Hz).

Protect the power cord from being pinched, walked on, or otherwise damaged. Be

especially careful where the power cable enters the power outlet and X-Ref subwoofer

unit.

Only connect the X-Ref subwoofer to an electrical outlet or extension cord of

appropriate type and rating.

The power cable for the X-Ref subwoofer should be unplugged from the outlet during

severe electrical storms, or when unused for a long period of time.

Only replace the fuse in the X-Ref subwoofer with a fuse of proper value and voltage

rating.

FCC Interference Statement

Note: This equipment has been tested and found to comply with the limits for a Class B

digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide

reasonable protection against harmful interference in a residential installation. This

equipment generates, uses and can radiate radio frequency energy and, if not installed

and used in accordance with the instructions, may cause harmful interference to radio

communications. However, there is no guarantee that the interference will not occur in

a particular installation. If this equipment does cause harmful interference to radio or

television reception, which can be determined by turning the equipment off and on, the

user is encouraged to try to correct the interference by one or more of the following

measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment into an outlet on a circuit different from that of the receiver.

Consult the dealer or an experienced radio/TV technician for help.

For questions regarding service, please contact:

Emotiva Audio Corporation

135 Southeast Parkway Court

Franklin, Tennessee

37064

(615)-790-6754

www.emotiva.com

DO NOT defeat the safety purpose of a grounding or polarized plug by removing ground

pins or using unsafe adapters. A polarized plug has two blades - one wider than the

other. A grounding type plug has a third ground prong in addition to the two main

conductors. The wide blade or third grounding prong is provided for your safety. If the

provided plug does not t your outlet, consult an electrician to replace your obsolete

outlet. If you replace the X-Ref subwoofer power cord, only use one of similar type and

equal or greater current rating.

You should seek service for your X-Ref subwoofer by qualied service personnel if any

of the following occur:

1. The power-supply cord or the plug has been damaged

2. The X-Ref subwoofer has been exposed to rain or had liquids spilled onto or into it

4. The X-Ref subwoofer exhibits a marked change in performance

5. The X-Ref subwoofer has been dropped, or its enclosure or chassis is damaged.

NOTE: TO COMPLETELY DISCONNECT THE X-REF SUBWOOFER FROM THE

AC POWER MAINS, DISCONNECT THE AC POWER CORD FROM THE AC

RECEPTACLE.

NOTE: THE X-REF SUBWOOFER’S AC POWER CORD MUST REMAIN READILY

ACCESSIBLE AT ALL TIMES.

The X-Ref subwoofer should only be cleaned as directed in the Operators Manual. Avoid

spraying or pouring liquids directly onto the X-Ref subwoofer.

CAUTION

CAUTION: TO REDUCE THE RISK

OF ELECTRICAL SHOCK, DO

NOT REMOVE COVER. NO USER

SERVICEABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIED

SERVICE PERSONNEL.

Page 1

Contents

Important Safety Precautions and Explanation of Symbols

Introduction .......................................................................2

About This Manual ..............................................................3

Features ............................................................................4

Unpacking .........................................................................5

The X-Ref 10 DSP Powered Subwoofer ................................... 6

Quick Start ........................................................................7

About Subwoofers ..............................................................8

Setting Up Your X-Ref 10 ..................................................... 9

Connections ..................................................................... 10

Subwoofer Placement ........................................................ 11

System Conguration ........................................................ 14

Subwoofer Conguration and Adjustment ............................ 17

Operation ........................................................................ 19

Care and Maintenance ....................................................... 20

Specications ................................................................... 21

Troubleshooting ................................................................ 22

Emotiva Audio Corporation Limited Warranty ........................ 24

Contact Information .......................................................... 25

Accessories ...................................................................... 26

Notes .............................................................................. 27

Page 2

Introduction

Thank you for purchasing Emotiva’s X-Ref 10 DSP Powered Subwoofer.

The X-Ref 10 DSP Powered Subwoofer was designed to deliver both the deep clean bass

and raw power you need for a truly impressive home theater experience along with the

speed, musicality, and accurate rendition of subtle detail necessary to t seamlessly

into an audiophile music system.

The X-Ref 10’s powerful long-throw woofer, high-efciency amplier, and switch-

mode power supply give it the ability to deliver tremendous amounts of deep clean

bass without breaking a sweat; the strong sealed cabinet, with its extensive cross-

bracing and internal damping, completely eliminates spurious vibrations and noises;

and the attractive Studio Black satin lacquer nish and removable grill help the X-Ref

10 blend into the decor of your home theater or music room. However, the X-Ref

10 isn’t all muscle and good looks. The advanced DSP Management System, with

its convenient push-to-engage rotary encoder and easy to read backlit LCD display,

makes conguration simple and straightforward, and provides the exibility and

nesse you need to congure this powerhouse to deliver perfect performance with

virtually any system or room. Of course we included everything you expect from a truly

advanced subwoofer, including both balanced (XLR) and unbalanced (RCA) inputs, our

sophisticated dynamics processing, and our elegant soft-limiting circuitry that protects

the X-Ref 10 without compromising the integrity of your music. And, nally, you get

Emotiva’s ve year transferable warranty and 30 day no-hassle return policy.

The X-Ref 10 takes subwoofer performance, convenience, exibility, and value to a new

level. We hope you enjoy listening to it as much as we enjoyed designing and building

it for you.

Happy listening!

The Emotiva Team

Page 3

About This Manual

This manual will provide you with all the information you need to get great

performance, accurate sound, and many years of reliable service from your

Emotiva X-Ref 10 DSP Powered Subwoofer.

Even if you’re familiar with subwoofers, we suggest that you read through the entire

manual; we kept things as short as possible and you might nd some interesting and

helpful tips and information. If you’re new to the subject, then we encourage you to

take the suggestions we offer as a starting point, and experiment until you achieve just

the results that you want.

If you’re really in a hurry to get started, please read the Quick Start section

(on page 7) and the Safety Instructions; then read the remainder of the manual at

your leisure.

You may wish to record serial numbers or other purchase information on the Notes

page at the back of this manual.

Page 4

Features

The Emotiva X-Ref 10 DSP Powered Subwoofer, with its advanced DSP Management

System, was designed to deliver impressive performance and outstanding sound quality

in both home theater and audiophile stereo music systems. The X-Ref 10 delivers the

deep bass you need for earth-shaking home theater special effects, while maintaining

the quality, accuracy, and superb musical rendition necessary for true high-delity

music reproduction. Some of the more important features of the Emotiva X-Ref 10 DSP

Powered Subwoofer include:

• Great sound and amazing bass. The X-Ref 10 has both the raw power to deliver

awe-inspiring special effects and the nesse to play the bottom octaves of music

with amazing depth, detail, and subtlety.

• Powerandefciency.The X-Ref 10’s powerful, high-efciency amplier and high

current switch-mode power supply deliver all of the power necessary to rattle the

walls, or play the lowest registers of a pipe organ or bass guitar with amazing depth

and clarity, without running up your electric bill or heating up the room.

• Ease of use. The X-Ref 10’s convenient push-to-engage rotary encoder, and easy

to read back lit LCD display, make conguration simple and straightforward.

• Flexible,accurate,andrepeatableconguration is provided by the X-Ref 10’s

advanced DSP Management System and fully congurable two-band parametric

equalizer.

• Advanced mechanical design, including a powerful 10” long-throw woofer with

a die-cast frame, massive motor assembly, woven tinsel leads, proprietary para-

aramid blended ber cone, and heavy-duty Butyl rubber half roll surround, and a

sealed cabinet with extensive cross bracing and internal damping, enables the

X-Ref 10 to produce prodigious amounts of smooth clean bass with no extra

vibrations, distortion, or unwanted distractions.

• Advanced electronic design, including Emotiva’s exclusive dynamics processing

and elegant soft limiting, delivers the clean power the X-Ref 10 needs to play all

types of source material with astonishing realism and no hint of strain or distortion

• Intelligent turn-on automatically switches the X-Ref 10 on when signal is present

and returns to standby mode when the music stops. The X-Ref 10’s Movie EQ

Trigger feature optionally activates a little extra punch for movie special effects

when instructed to do so.

• Applicationexibility. Professional balanced (XLR) and unbalanced (RCA) input

connections allow you to connect the X-Ref 10 to both home theater and stereo

sources. A balanced feed through output lets you add additional subwoofers.

• Good looks and practicality. The X-Ref 10’s compact size, Studio Black satin

lacquer nish, and removable grill allow it to blend easily into any room decor. Both

aluminum spikes and non-marring rubber feet are included to allow you to use the

X-Ref 10 with any type of ooring, and the front-ring design helps simplify room

placement and minimize room interactions.

You can nd more information about the X-Ref 10 DSP Powered Subwoofer on our Web

site at http://www.emotiva.com

Page 5

Unpacking

Your Emotiva X-Ref 10 DSP Powered Subwoofer was carefully packed and should reach

you in perfect condition. If you notice any shipping damage or other issues when you

unpack it, please contact Emotiva immediately.

Gently remove your X-Ref 10 from the packing carton and remove all wrappings and

shipping material. Use care when handling or lifting the X-Ref 10 since it is quite heavy.

Avoid pressing directly on the woofer cone or the surround, and avoid resting your

X-Ref 10 on its front, top, or back while unpacking it.

PLEASE NOTE: THE POWER CORD AND SPIKED FEET ARE INCLUDED IN THE

LOWER PACKAGING MATERIAL! DO NOT DISCARD PACKAGING MATERIAL

WITHOUT FULLY UNPACKING ALL PARTS!

It is important to save the box and all packing materials in case your X-Ref 10

subwoofer ever needs to be moved or shipped back to the factory for service.

Please keep your sales receipt in a safe place. It is the easiest way to verify your

purchase date for warranty purposes, and may also be required if you ever have to le

an insurance claim.

We truly value customer feedback and would like to hear from you.

Page 6

UNBALANCED

STEREO INPUTS

MOVIE EQ TRIGGER

POWER

The X-Ref 10 DSP Powered Subwoofer

Back lit LCD

status display

High-power 10 inch

long-throw woofer

Rotary encoder

Balanced output

(XLR)

Unbalanced stereo

inputs (RCA)

Power and Standby

indicator

AC Power switch

IEC power cable

receptacle with

integral fuse holder

Balanced input

(XLR)

Movie EQ Trigger

input

Page 7

Quick Start

To get the most from your Emotiva X-Ref 10 DSP Powered Subwoofer, we strongly urge

you to read the entire manual. If you just can’t wait to hear how great your X-Ref 10

subwoofer sounds, this section will cover the basics you need to get started.

• Find a secure location for your X-Ref 10 DSP Powered Subwoofer.

• Plug your X-Ref 10 DSP Powered Subwoofer into a grounded AC electrical outlet. If

you use a different power cord or extension cord, use only a three-prong grounded

type with sufcient current rating.

• Connect your X-Ref 10 to the “subwoofer” or “LFE” output on your source

equipment (preamp or home theater pre/processor).

• Congure the bass management on your source equipment according to the

manufacturer’s instructions.

• Turn on the Power switch on the rear panel of the X-Ref 10.

• Enjoy the music.

While you’re enjoying your X-Ref 10 DSP Powered Subwoofer, it would be a great time

to read the rest of the manual to learn more about it.

Page 8

About Subwoofers

The design of virtually all loudspeakers involves compromises; and producing large

amounts of undistorted low bass is often difcult (and expensive) to achieve in a full-

range speaker. Most full-range speakers, therefore, simply aren’t designed to produce

extended output at very low frequencies. This has historically been a limitation of high-

end stereo speakers, and is often considered to be “an acceptable compromise” in

many otherwise superb stereo systems; many audiophiles simply accepted that they

weren’t going to hear the lowest octaves of a pipe organ or feel the solid punch of a

drum with lifelike realism.

When home theater entered the scene, with its demand for the prodigious bass to

accurately reproduce sound effects that you could actually feel, this limitation was

addressed by including a separate speaker designed especially to produce only low

bass; the subwoofer. The addition of a subwoofer simplies the job of designing the

other speakers, which no longer need to be totally full-range. It was also discovered

that low frequencies (typically below 100 Hz) are virtually non-directional to the human

ear, so a single subwoofer can provide the low frequencies for both channels in a stereo

system or all channels in a multi-channel system.

In principle, it should be simple to design a subwoofer that can do a great job of

producing the narrow range of frequencies required. Unfortunately many early

subwoofers, while they did a good job of producing window-rattling explosions,

dinosaur stomps, and subway crashes, didn’t sound very good with music. It turns out

that it’s a lot easier to design a subwoofer that can make lots of earth-skaking bass if

low distortion and smooth frequency response aren’t major concerns.

Now, however, as home theater listeners are coming to expect not only loud bass, but

high quality bass, and audiophiles are starting to look for the same impressive bass

performance from their stereo systems, but only if it sounds as good as the rest of

their system, there is a need for subwoofers that can both rattle the oor and deliver

extended low end with superb musicality.

Fortunately, advances in speaker technology, such as new cone and cabinet materials,

more powerful and efcient ampliers, and advanced DSP management systems, have

made it possible to design a subwoofer that can deliver both thunderous special effects

and superb musical performance. One of the leaders of this new generation of “super

subs”, at home in both high-end home theater systems and audiophile stereo systems,

are the new Emotiva X-Ref DSP Powered Subwoofers.

Page 9

The DSP Difference

Analog circuits, while simple to design and implement,

have several serious shortcomings. Not only is it difcult

to set a knob (or read where it’s set) accurately, but

individual variations in the analog circuitry itself may make

it difcult to accurately set certain parameters, or to return

to previous settings. There are also practical limitations

about what functions can be achieved with analog circuitry.

Properly designed DSP (digital) controls give you greater

exibility, higher precision and repeatability, better

performance, and access to features simply not practical

with analog controls, and they do so at lower cost. In

addition, our convenient push-to-engage rotary encoder

is easier to use than a dial or knob, and the LCD display is

easy to read and simple to understand.

Setting Up Your X-Ref 10

Setting up your X-Ref 10 DSP Powered Subwoofer for optimal performance is really a

three-step process. The rst part consists of deciding where to place your X-Ref 10

(or a pair of them). The second part consists of conguring your source equipment and

your X-Ref 10 to work perfectly together. The third and nal part consists of using the

X-Ref 10’s advanced DSP Management System to congure it to perfectly match your

room and other equipment.

While none of this is terribly complicated (and the X-Ref’s advanced DSP Management

System makes it a lot easier and more precise), it still makes sense to plan what you

intend to do in advance.

The best conguration for your subwoofer (or subwoofers) depends, to a large degree,

on what type of system you have. The simplest and most effective way to congure

bass management and equalization is to allow your source component or components

to do the bass management, and use the controls on the subwoofer to ne-tune it to

your particular listening room and placement choices. The advanced DSP Management

System makes it simple to congure the X-Ref 10 to be a perfect match for virtually

any room. (While the DSP Management System also offers precise control of the

crossover point, it isn’t able to bass manage other components, so if your source

components have bass management, it’s best to set the X-Ref’s X-Over control to

Direct and allow your source components to handle the bass management).

Page 10

Connections

Inputs

Typically the balanced (XLR) input is used to connect the X-Ref 10 to the balanced

output labelled “subwoofer” or “LFE” (low-frequency effects) on a home-theater pre/

processor, and the stereo unbalanced (RCA) inputs are used to connect the X-Ref 10 to

the output of a stereo preamp. The X-Ref 10 automatically switches on when it senses

signal on either input.

In addition, the X-Ref 10 offers a feature which automatically adds a little extra punch

when you’re watching a movie (it increases low bass by about +6 dB at 45 Hz). This

feature is enabled by connecting the Movie EQ Trigger input on the X-Ref 10 to the

trigger output on your home-theater pre/processor. (Assuming you have a stereo music

source connected to the unbalanced inputs on the X-Ref, and a home-theater pre/

processor connected to the balanced input, the Movie EQ Trigger input can activate the

bass boost when the home-theater pre/processor is turned on).

If you have a pre/processor (like Emotiva’s UMC-1) which has programmable trigger

outputs, this allows the Movie EQ boost to be turned on by the pre/processor for

certain types of program material.

The Movie EQ can also be manually congured via the DSP Management System menu.

Refer to the diagram on Page 19 for details.

Outputs

The balanced (XLR) output on the X-Ref 10 provides a duplicate of the input signal and

is intended for connecting one or more additional X-Ref 10 (or other) subwoofers.

UNBALANCED

STEREO INPUTS

MOVIE EQ TRIGGER

UNBALANCED

STEREO INPUTS

STEREO PREAMP WITH SEPARATE HF & LF OUTPUTS HOME THEATER PRE/PROCESSOR

LFE / SUB

OUT

TRIGGER

OUT

X-OVER

DIRECT

A typical installatiion, with a

single X-Ref 10 DSP Powered

Subwoofer providing bass

enhancement for both a

stereo system and a home-

theater pre/processor

Page 11

Subwoofer Placement

Deciding where to place a subwoofer (or a pair of them) is often a compromise

between practicality and acoustics. When selecting the ideal location for your X-Ref 10

DSP Managed Subwoofer, the goal is to choose a location that produces smooth, clean,

well dened bass (and not necessarily the location that produces the most bass). Even

though the sophisticated DSP Management System in the X-Ref 10 gives you very

precise control, you will still get the best overall results with the least amount of work if

you nd a location where the subwoofer sounds clean and well dened before you start

adjusting it. Because low bass is non-directional, it is not necessary to choose a central

location for one subwoofer, nor to locate two subwoofers in symmetrical locations.

The locations that work best in a given room depend on the size, shape, and

construction of the room, as well as on room surface treatments (like carpeting)

and furniture. The most precise method for determining where to place one or more

subwoofers is to take careful measurements with a sound pressure level (SPL) meter,

analyze the results, and then test the likely locations that result. However, with a little

experimentation, you can achieve excellent results by ear alone.

Listener

Center

Left Side

Surround

Right Front

Display

Right Side

Surround

Left Rear

Surround

Right Rear

Surround

Sub-woofer

Left Front

Sub-woofer

Sub-woofer Sub-woofer

Several factors determine

which locations work best for

a subwoofer in a given room.

The easiest way to get great

results is to experiment with

different locations until you

nd the right one. Here are

some locations you can try.

Page 12

One method for choosing a location that produces very good results, although it’s a

bit undignied, is to place the subwoofer temporarily in your listening location, and

then sit on the oor in each potential subwoofer location and listen to the results. The

locations where the bass sounds powerful, yet clean and not boomy or muddy, are

probably good choices for where to place your subwoofer. Alternately, you can simply

try the subwoofer in different locations that are compatible with your room decor and

choose the location that sounds best.

You will also nd that some audio components (especially turntables) are very sensitive

to low bass frequencies. Adding a subwoofer may expose this weakness in previously

well-behaved equipment, so you should be careful to isolate such components from

vibrations transmitted via the oor or through the air. Sensitive components should be

mounted on isolation feet or platforms, and a subwoofer should not be placed too close

to them (which may rule out certain potential locations).

Before starting, you should locate several pieces of music that you are familiar

with that contain substantial low frequency content. Look for music that contains

instruments or “interesting” sounds rather than single-tone electronic effects or

explosions. A recording of “pink noise” works well for some people, although test tones

intended for use with a meter are usually not very useful when doing things by ear.

Remember that the ideal location will be one where bass response is smooth, and no

specic tones are unduly emphasized or missing. (If you notice that a particular tone

seems to “drag on” long after it should have stopped, or that a particular frequency

or instrument sounds boomy or muddy, you are probably experiencing a resonance at

that frequency, and should avoid using the location where it occurs.)

You will also probably nd that, while certain subwoofer locations produce the best

result for a single listening position (like your favorite chair), other locations may

produce better overall results for a larger area (the entire couch or group of chairs

where you and your family sit on Saturday evenings). Always remember that the best

location is simply the one that works best for you with your room and your equipment.

Finally, avoid locations that place your X-Ref 10 directly in front of a window or

heating vent, or in particularly damp or hazardous locations, and avoid locations that

encourage people to place foreign objects on top of your X-Ref 10. (Your X-Ref 10 is

a precision piece of audio gear and not a coffee table or plant stand. Placing objects

on top of your X-Ref 10 not only risks causing damage, but the vibration of the top in

normal use virtually ensures that they will fall off!)

Page 13

The following suggestions are intended as guidelines to help you decide which locations

to try for your X-Ref 10 DSP Powered Subwoofer(s):

• Corner placement usually produces the most bass, but sometimes produces

poorlydenedorboomybass. A corner location that produces a lot of clean

bass is ne; if, however, the bass is boomy or resonant then you should try another

location.

• Try various locations along side and rear walls. It’s often better to place a

subwoofer several feet away from the corner along one wall; any location anywhere

along a wall may be a good spot to locate your X-Ref 10.

• Avoid locations where your X-Ref 10 will be exposed to direct sunlight or

water (and don’t sit plants or other electronic equipment on top of it).

• A subwoofer should not be heard as a distinct source of sound. A properly

congured subwoofer should add a solid “foundation” to your music; it should

not, however, be discernible as a separate source of sound. Even though low

bass is non-directional, certain locations may cause the subwoofer to “stand out”

acoustically and should be avoided.

• Multiple subwoofers should sometimes be placed at different types of

locations. For example, if you are adding a second X-Ref 10 to an existing one

located in a corner, it’s may be a good idea to try locating the second one along

a wall. Certain locations sometimes accentuate certain frequencies; by varying

locations you average out the variations and get a smoother overall response.

At Emotiva we prefer symmetrical subwoofer placement in front locations if it’s

practical; we believe that your ears are sensitive to pressure differentials that,

although not audible, may nonetheless affect the integrity of the front sound stage.

• Avoid placing subwoofers within several feet of a turntable or other sensitive

audio device. Even if you use isolation feet or an isolation base, low frequency

vibrations travel directly through the air, and may be coupled to a turntable arm

or platter. You may also nd that your turntable is more immune to vibration with

(or without) the dust cover in place. The result of acoustic feedback may be actual

howling noises or record skips or a more subtle muddying of the bass on some

musical passages. Since a lot of audio equipment is at least somewhat sensitive

to vibration, you may get better results by locating your subwoofer along a side or

back wall rather than by placing it directly behind or beside your equipment rack.

• Sound becomes less directional as the frequency gets lower. The sound

coming from a subwoofer congured to cross over at 80 Hz (the THX™ standard) is

almost totally non-localized, but localization increases at higher frequencies. If you

are noticing sound localization from a subwoofer congured to a frequency above

100 Hz, try choosing a lower crossover frequency.

Page 14

SystemConguration

Conguring the X-Ref 10 for use with a

home theater system

Virtually all home theater pre/processors and receivers include bass management,

so it’s best to set the X-Ref 10 X-Over (crossover) setting to Direct and let the pre/

processor handle the bass management. Many high-end home theater pre/processors

include equalization controls of some sort. If your pre/processor includes automatic

equalization, then you should consider letting it handle the equalization. If your pre/

processor has simple graphic-equalizer type controls, then you will probably nd that

the X-Ref’s advanced parametric equalizer controls make adjustment easier and do a

better job. While it is possible to use source component and subwoofer equalization

controls simultaneously, and doing so may actually prove useful in certain situations,

it’s usually easier to achieve better results if you use one and leave the other set to

at.

Conguring the X-Ref 10 for use with a stereo system

Sophisticated high-end stereo preampliers often include bass management, in which

case it is best to set the X-Ref 10 X-Over setting to Direct and let the preamp handle

the bass management. If the bass management in your preamp also includes simple

shelving or graphic-equalizer type controls, then you should probably not use them,

since the X-Ref’s advanced parametric equalizer controls make adjustment easier

and do a better job. While it is possible to use source component and subwoofer

equalization controls simultaneously, and doing so may actually prove useful in certain

situations, it’s usually easier to achieve better results if you use one and leave the

other set to at.

Conguring the X-Ref 10 for use with a stereo system

without bass management

In a system with bass management, very low frequencies are directed to the subwoofer

and away from the main or satellite speakers. The advanced DSP Management System

in the X-Ref 10 provides complete control of the frequencies handled by the X-Ref 10

but does not control the frequencies being handled by other speakers (which is what

bass management does).

If your preamp lacks bass management, you can still add an X-Ref 10 subwoofer to

augment the low bass frequencies produced by your main speakers, and the precise

X-Over (crossover) and Equalization settings on the X-Ref 10 can then be used to

congure a smooth transition between your subwoofer and main speakers. You must

remember, however, that the low frequencies will still be reaching your main speakers.

If your main speakers are full range, this will not be a problem. If, however, your main

speakers are “small” or “satellites”, then you should add an extra line level crossover or

high-pass lter to prevent low frequencies from reaching your satellites or small main

speakers (failure to do so may damage them).

Page 15

Conguring the X-Ref 10 for use with a combined stereo

and home theater system

There are several ways you can congure a combined stereo and home theater system

to work with your X-Ref 10.

Separate stereo preamp and home theater pre/processor

If you have entirely separate stereo and home theater systems, both with bass

management, and intend to share one X-Ref 10 (or one pair) between them, then the

best option is to simply connect the subwoofer outputs of each to one of the X-Ref’s

input connectors. (Connect one to the balanced input and one to the unbalanced input.

If one source component is physically closer, use the unbalanced cable for the shorter

cable run if possible.) Set the X-Over (crossover) to Direct on the X-Ref 10 to allow the

preamp and pre/processor to each handle their own bass management.

The X-Ref 10 also offers a feature which automatically adds a little extra punch when

you’re watching a movie (it increases low bass by about +6 dB at 45 Hz). This feature

is enabled by connecting the Movie EQ Trigger input on the X-Ref 10 to the trigger

output on your home-theater pre/processor. (Assuming you have a stereo music source

connected to one input on the X-Ref, and a home-theater pre/processor connected to

the other input, the Movie EQ Trigger input is typically congured to activate the bass

boost when the home-theater pre/processor is turned on).

If you have a pre/processor (like Emotiva’s UMC-1) which has programmable trigger

outputs, this allows the Movie EQ boost to be turned on by the pre/processor for just

certain types of program material.

This conguration should also work well if you have a separate preamp and pre/pro but

use “HT Bypass” or “Direct Mode” on either to allow both to share one power amp and

set of speakers for the front channels.

Stereo preamp (without bass management) and

home theater pre/processor

If you have a separate stereo preamp and home theater pre/processor, and your stereo

preamp does not have bass management (but you use your stereo preamp as a phono

preamp), the easiest solution is to connect the Tape Output of your stereo preamp to

one of the high-level inputs (Aux In) on your home theater pre/processor. This will

allow your pre/processor to control most aspects of playing music, including bass

management, yet allow you to play records via your stereo preamp.

Another option is to purchase an external line-level crossover to provide bass

management for your stereo preamp (passive or active) and then congure everything

as described above.

Page 16

Conguring your system to work with your

X-Ref 10 DSP Powered Subwoofer

No special conguration of your system is required for it to work perfectly with the

Emotiva X-Ref 10 DSP Powered Subwoofer. Most bass management systems will cross

over between the main or satellite speakers and the subwoofer at between 80 Hz and

120 Hz (80 Hz is the THX™ standard crossover point). The X-Ref 10 DSP Powered

Subwoofer is at to above 200 Hz, and so will work perfectly with any crossover setting

your bass management system chooses to implement.

If you are conguring a preamplier with bass management (like our Emotiva

USP-1) to work with satellite speakers, then choose the crossover point recommended

by the manufacturer of your speakers (this is often 80 Hz for “satellite” speakers). If

you are using full range speakers, then experiment with crossover points at or below

80 Hz until you achieve a pleasing result (the goal is to choose a point at or above the

frequency at which your main speakers sound strained or start to roll off in frequency

response).

If you are using a preamplier without bass management, and you have full range

main speakers, then you will be using the X-Over (crossover) conguration on the

X-Ref 10 to congure the X-Ref to cut off at or about the frequency where your main

speakers stop producing sufcient bass, and the Volume conguration on the X-Ref to

match its level to that of your main speakers so the overall sound is continuous and

smooth - with no sudden jumps in output level. Simply try different frequencies until

you achieve a pleasing result.

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Emotiva X-Ref 12 User manual

Brand: Emotiva

Model: X-Ref 12

Category: Supplementary music equipment

Type: User manual

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